INVESTIGADORES
AGUIRRE Pio Antonio
artículos
Título:
Wastewater treatment plant synthesis and design: Combined biological nitrogen and phosphorus removal
Autor/es:
ALASINO, NOELIA; MIGUEL C. MUSSATI; NICOLÁS J. SCENNA; AGUIRRE PIO
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2010 vol. 49 p. 8601 - 8612
ISSN:
0888-5885
Resumen:
In the present work, a previous superstructure model developed for simultaneous optimization of the process
configuration and equipment dimensions, i.e., optimal process synthesis and design and the operation conditions
of activated sludge wastewater treatment plants, is extended to account for phosphorus as well as nitrogen
removal. Along the activated sludge treatment process, the wastewater stream is exposed to different
environmental conditions (anaerobic, anoxic, and aerated zones) in order to facilitate the different
microbiological processes such as the release and uptake of phosphorus and the nitrification/denitrification
processes. The Activated Sludge Model No. 3 extended with the Bio-P module for computing biological
phosphorus removal is used to model the reaction compartments and the Taka`cs model for representing the
secondary settler. The performance criterion selected is the minimization of the net present value that includes
investment and operating costs while verifying compliance with the effluent permitted limits. The problem is
posed as a NLP problem, specifically a nonlinear programming problem with discontinuous derivatives DNLP.
The optimization model is implemented and solved using a General Algebraic Modeling System, GAMS.
Optimal configurations and designs obtained for several case studies are reported and discussed. The model
itself and the resolution methodology prove to be robust and flexible enough to solve efficiently scenarios
with a wide range of operation conditions, embedding conventional and nonconventional process configurations.